<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>验证邮箱地址是否已经注册</title>
	<link rel="stylesheet" href="/assets/bootstrap/dist/css/bootstrap.min.css">
	<style type="text/css">
		p:not(:empty) {
			padding: 15px;
		}
		.container {
			padding-top: 100px;
		}
	</style>
</head>
<body>
	<div class="container">
		<div class="form-group">
			<label>邮箱地址</label>
			<input type="email" class="form-control" placeholder="请输入邮箱地址" id="email">
		</div>
		<!-- 错误 bg-danger 正确 bg-success -->
		<p id="info"></p>
	</div>
	<script src="/js/ajax.js"></script>
	<script>
		// 获取页面中的元素
		var emailInp = document.getElementById('email');
		var info = document.getElementById('info');

		// 当文本框离开焦点以后
		emailInp.onblur = function () {
			// 获取用户输入的邮箱地址
			var email = this.value;
			// 验证邮箱地址的正则表达式
			var reg = /^[A-Za-z\d]+([-_.][A-Za-z\d]+)*@([A-Za-z\d]+[-.])+[A-Za-z\d]{2,4}$/;
			// 如果用户输入的邮箱地址不符合规则
			if (!reg.test(email)) {
				// 给出用户提示
				info.innerHTML = '请输入符合规则的邮箱地址';
				// 让提示信息显示为错误提示信息的样式
				info.className = 'bg-danger';
				// 阻止程序向下执行
				return;
			}

			// 向服务器端发送请求
			ajax({
				type: 'get',
				url: 'http://localhost:3000/verifyEmailAdress',
				data: {
					email: email
				},
				success: function (result) {
					console.log(result);
					info.innerHTML = result.message;
					info.className = 'bg-success';
				},
				error: function (result) {
					console.log(result)
					info.innerHTML = result.message;
					info.className = 'bg-danger';
				}
			});

		}
	</script>
</body>
</html>